Second-harmonic generation in periodically poled nonlinear polymer waveguides

Abstract

We demonstrate quasi-phase-matched (QPM) second-harmonic generation (SHG) at the optical communication wavelengths with side-chain polymer waveguides. A ridge waveguide structure is designed to support fundamental mode guiding at both the pump and the second harmonics, leading to a high field overlap integral of the guided modes. The nonlinearity contrast in the $+/0$ type QPM waveguide is maximized under a QPM poling electrode width of nearly half the coherence length. Using these configurations, we record a normalized SHG efficiency of $2.2\% {\mathrm{W}}^{-1} {\mathrm{cm}}^{-2}$ in the polymer waveguide.

© 2004 Optical Society of America

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